>>>>So what happens if you dose NH4 (say 0.5ppm) and do daily water changes of 50%+? It does not cause algae. So why? (I know)<<<< Are you saying that if I do a 50% water change everyday that I won't have any algae? Bill _______________________________________________ Aquatic-Plants mailing list Aquatic-Plants at actwin_com http://www.actwin.com/mailman/listinfo/aquatic-plants